20120212112 has 160 divisors (see below), whose sum is σ = 53060770560. Its totient is φ = 7136501760.

The previous prime is 20120212097. The next prime is 20120212117. The reversal of 20120212112 is 21121202102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (20120212117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1160564 + ... + 1177772.

It is an arithmetic number, because the mean of its divisors is an integer number (331629816).

Almost surely, 2^20120212112 is an apocalyptic number.

20120212112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20120212112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26530385280).

20120212112 is an abundant number, since it is smaller than the sum of its proper divisors (32940558448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20120212112 is a wasteful number, since it uses less digits than its factorization.

20120212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17321 (or 17315 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20120212112 its reverse (21121202102), we get a palindrome (41241414214).

It can be divided in two parts, 20120 and 212112, that added together give a palindrome (232232).

The spelling of 20120212112 in words is "twenty billion, one hundred twenty million, two hundred twelve thousand, one hundred twelve".